Don't bother with the 80-400. 400 f/5.6 on the D100/D1X looks awful. The images are quite soft, and the focus, even limited, has a hard time picking up an object, and holding focus. I noticed this on my F100 too. My suggestion is 70-200 f/2.8 + TC
. It'll run about $500 more than the VR
, but believe me, the quality is much better. Another option is the 70-200 f/2.8 TC
. I've shot this combination before, and I didn't have a quality problem.